Milk cooler



ing of milk or cream.

Patented Jan. l2, 1943 MILK CooLER Y Oscar 0. Newhouse, Brandon, Minn.

Application April- 18, 1940, Serial No. 330,382

5 Claims.

This invention relates'to apparatus for cooling a uid and isparticularly adapted for the cool- An object of this invention is toprovide a simple, self-contained cooling apparatus requiring no externalpower, but may be operated by other Vpower if desired. A further objectis to provide an apparatus which will more rapidly cool the vmilk thanheretofore, and in which there will be adjusting the height of thereceptacle in relation to the height of the cooling fluid in the outercontainer. l

Other objects and the nature and advantages of the invention will beapparent from the following description taken in conjunction with theaccompanying drawing, wherein:

Fig. 1 is a front elevation of the assembled device; v

Fig. 2 is a sidev elevation of the device shown in Fig. 1; f

Fig'. 3 is a detailed view of the segmental pulle showing theassociation of the bevel pulley and vertical shaft therewith; Y

Fig. 4 is a View of the shaft assembly and spring;

Fig.. 5 is a horizontal cross section of the can or receptacle of Fig.1; and

Fig. 6 is an enlarged fragmentary view of the face of the segmentallpulley of Fig. 3.

Referring to Fig. 1, I provide a large tank or container I which ispartially filled with a cold liquid, preferably water, which may or maynot havev ice in it. A frame II is fastened to the ceiling or otherconvenient support I2 in a position above the receptacle I0. This framehas bearings I3 through whichthe shaft I4 passes. On one end of theshaft I4 is provided a pulley I5, across the top of which a rope orchain I6 passes. Weights I1 and I1 cause a unidirectional rotation ofpulley I in the well-known manner. A split or segmental pulley I8 isprovided on the other end of the shaft I4 and rotated thereby. Thepulley I8 will -be more fully described later.

A shaft I3 having a squared lower portion 20 is journaled in bearings 2lof the frame H directly below the pulley I 8. .A shaft 22 cooperateswith the shaft I9 so as to transmit torque to cover 23. The shaft 22 isa slip fit on shaft I9, and its inside contour is similar to the crosssection of the lower end of shaft I9. This need not be square, but maybe of any non-circular cross section. The lower end `of shaft 22 Aisrigidly secured to the center of the plate or cover 23. The periphery ofcover 23 may be formed with an upwardly and outwardly projecting edge.Two notches 24 are cut into the cover 23 atopposite sides thereof. Theedge portion of the cover on one side of each notch may be cut lower, asshown in Fig. 1, to facilitatepositioning of the bail 21 therein. Thebail 21 is shaped so that mid portions of its sides will lie in thenotches 24, thus supporting can 25. The upper extremity 28 of the bail21 is placed in the slotn35 located towards the lower end of the shaft22. This slot has a downwardly extendingV opening which acts to forceand retain lower portions of rthev bail 21 tightly within notches in theprojections 4or blocks 24 which are xed to the cover 23. The top orcover 23 is formed "of a sufficient' size so as to extend beyond theperiphery of the can 25 in order to prevent excessive tipping of the can25 on the bail 21 due to the buoyant effect of the cooling iiuid when asmall amount of liquid is `placed in the can 25. k

The length of the bail 21 is such as to maintain the can 25 a slightdistance below the lower face of the cover 23 so as to permit aerationof the milk or cream while it is being cooled. Y Legs 31 may bepositioned on the bottom of the can 25 in case that a can having thebottom ush with the extremity of the sides is used. If a can having arecessed bottom is used, not shown, means must be provided to releaseair that would normally be trapped within the recessed bottom when thecan 25 isplaced in the cooling fluid.

A spring 29 is positioned around the outside of shafts I9 and 22, andone end'is connected to each shaft, see Fig. 4.- The function ofv spring29 will be discussed in connection with the action of pulley I8. The can25 may be of any cross section, but is preferably of non-circularhorizontal cross section, as shown in Fig. 5. I prefer an oval crosssection.

A small bevel pulley 30 is rigidly attached to the upper extremity ofshaft I9, and is frictionally rotated -by the segmental pulley I8. The

pulley I8, see Fig. 3, is composed of two semicircular segments ofV-shaped cross section, the centers of the segments 33 and 34 beingoppositely and eccentrically displaced relative to the axis 35 of thepulley IB, see Figs. 2 and 6. The axis of the shaft I9 is oi'set fromthe axis of shaft I4 an amount approximately equal to or slightlyexceeding the eccentric displacement of segments 3l and 32. Thisdisplacement of shaft I9 permits the pulley 3B to turn freely andwithout binding as the pulley I8 revolves. Thus, it is apparent thatwhen the shaft I4 is rotated unidirectionally, the segments SI and 32alternately engage opposite sides of the pulley 30 rotating the shaft I9first in one direction for a few turns and then in the oppositedirection.

Since the segments 3| and 32 of the pulley I8 are displaced eccentric tothe: axis f the pulley, as the pulley rotates it will impart areciprocatory motion to pulley 30 and shaft I9 as well as an oscillatoryone. The reciprocatory motion of shaft I9 will be transmitted throughspring 29 and impart a gentle vertical reciprocatory movement to can 25,while the shafts I9 and 22 transmit oscillatory motion by means of thecover 2.3 :and

ball 21 to can 25.

The cooling can 25 and shaft i9 are suspended from pulley which rests on`the beveled :inner surfaces of the segments 3i and 32, Vbut the greaterportion of the weight of the can and contents is supported by thebuoyant eiect of the displaced cooling liquid in the tank I9.

To compensate for varying levels of liquid in the container I0 or can25, spring 29 may contract or expand its length so that it will alwayssupport can 25 in container I with the liquid level approximately thesame as the liquid level inthe container I0.

To operate this device, `the material to be cooled is placed in can 25,andthe bail 21 -attached by means of the ears 26. The container I0 maybe previously iilled with Water or other cooling vfluid and the can 25may be placed in the container I0 with the bail 21 positioned in thenotches of block 24 and locked in place by engaging .the upper .end -28of the 'bail in .notch 3S To operate this device it is necessary only to.move the weight AI1 Vup to the position shown .in Fig. 1, which allowsthe cooperating weight I1a to assume a position near the floor. WeightI1 imparts a rotary motion to shaft I4, AWhile the function of WeightI1*l is to provide friction between the rope or chain I6 and pulley I5.It will be seen that I have provided a simple and inexpensive means forsupplying power to rotate the can 25 without the use of any externalpower.

Since the .horizontal cross section of can 25 is non-circular, when itis rotated it will cause a constant circulation of liquid in thecontainer I0 so as to effect `a rapid transfer of heat from the liquidin can 2.5 to liquid in the container IU. The reciprocatory motion ofcan 25 also makes for more rapid cooling of the contents of the can dueto the fact that this constant agitation circulates liquid in both the.can 25 and the container I0.

In this device the short time required for cooling due to the extremelyefficient heat transfer between the cooling fluid and the ,liquid to becooled makes the use of lweight driven rotation means practical.

It will be understood that changes and modlflcations in design andconstruction may be adapted within the scope of the invention as definedby the appended claims.

I claim:

l. An apparatus for tempering fluids, in combination with a tank oranalogous container having therein a tempering fluid and a receptaclecontaining the fluid to be tempered, means resilientlysuspending saidreceptacle in the tank, and means'forimparting simultaneous oscillatoryand axial reciprocatory movement to said receptacle, and to saidsuspending means.

2. In apparatus for tempering fluids, in combination with a tank oranalogous container having therein a tempering fluid and a receptaclecontaining v the fluid to be tempered, resilient means suspending saidreceptacle in the tank, and. means, including an extensible shaftpositioned within said resilient means, for imparting simultaneousoscillatory ,and reciprocatory move- Vment to said receptacle. g i

3. In apparatus for tempering iluids, in combination with a tank oranalogous container having therein a tempering fluid and a receptaclecontaining the fluid to be tempered, means re- .siliently suspendingsaid receptacle in the tank, andA means 4including a segmentalpulleyhaving the segments thereof mounted veccentricj-tethe axis of saidpulley for imparting simultaneous oscillatory and reciprocatory movementto Vsaid receptacle. 7

4. In apparatus for tempering jil-uids, combination with a tank oranalogous ycontainer having therein a tempering fluid and a receptacle`of non-circular horizontal :cross section containing fluid to betempered, a cover for -said receptacle, and means .engaging saidAreceptacle for suspending said receptacle in the tank and impartingrotary motion thereto, said .means suspending said receptacle in spacedrelation'to the ycover thereof, andmeans engaging said suspending meansfor maintaining said receptacle in a substantially vertical positionwhilev immersed in the tempering fluid.`

5. In apparatus for tempering fluids, incombination with a tank oranalogous .container vhaving therein a tempering fluid and a receptacleof non-circular lhorizontal cross section containing fluid to betempered, a ccverfor said receptacle, and means engaging said receptacleyfor suspending said receptacle in the tank and imparting rotary motionthereto, said' means suspending said receptacle in spaced relation tothe` cover thereof, and means including notches formed in said cover forengaging said suspending means and for maintaining said receptacle in asubstantially vertical position while immersed in the tempering iluid,the edge .of said cover being extended further on one side .of saidnotches.

OSCAR lO. NEW'HOUSE.

